Hand nailing apparatus



(No Model.)

M. BROOK. HAND NAILING APPARATUS.

No. 601,942. Patented Apr. 5, 1898.l

l'llilll UNITED STATES'Y v PATENT VOrmes MATTHIAS BROOK, OF BOSTON,MASSACHUSETTS, ASSIGNOR TO THE CON- SOLIDATED t MOKAY LASTING MACHINECOMPANY, OF PORTLAND,

MAINE.

HAND NA|| |NG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 601,942, dated April 5,1898. Application led August 14, 1897. Serial No. 648,237. (No model.) V

To all whom t may cori/cern:

Be it known that I, MATTHIAS BROCK, of Boston, county ofSuffolk, Stateof Massachusetts, have invented an Improvement in Hand NailingApparatus, of which the followingdescription, in connection with theaccompanying drawings, is a specification, like letters and figures o'nthe drawings representing like parts. v This invention relates tonailing apparatus of the type adapted to be held in or carried by onehand of the operator and operated by the other hand/ and commonly knownas hand-mailers or hand-tackers; and the object of the invention is tosimplify and improve apparatus of this type,particularly with the end inview of rendering the action of the apparatus easier and less liable tobe disarranged or broken under customary usage.

The several features of vmy invention will be hereinafter fully setforth inl connection with the accompanying drawings and specification. f

In the drawings, Figure 1 is a side elevation of an apparatuscontaining'one embodiment of my invention; Fig. 2, a left-hand edge viewof Fig. 1; Fig. 3, a partial rear side view of Fig. 1; Fig. 4, a detailof the feed-actuating devices to be described.

Referring to the drawings inY the embodiment of my invention thereshown, A indi-V cates a hand piece or case provided with a head A' 5 d,a driver arranged within the case and indicated only by dotted lines,Fig. 3; d2, a driver actuator or carrier having a suitable striking-capCIG; A6, the nose through which the tacks or fastenings are driven intothe Work, and A2 the raceway, all of which may be ofl any suitable ordesired constructionsuch, for instance, as shown in Letters Patent ofthe United States, No. 537,269, issued to me April 9,1895, to whichreference may be had for a description of the operation of such parts,although it is to be understood my invention, to be hereinafterdescribed, is not restricted to its use in connection with thisparticular mechanism, the latter being shown merely as an example of anymechanism of this type to enable my invention to be under- 5o.

stood.

the hopper acting in'any suitable'manner, as

will be understood by those skilled in the art, to 'deliver'thefastenings contained therein to said raceway, through or along whichthey are delivered to the driving mechanism.

I have herein shown a rotary hopper; .yet it vwill be understood thatsome parts of my invention may be equally well applied to other forms ofhopper or receptacle wherein a rotary movement of somepart is Yemployeddirectly or indirectly to govern or control the delivery of thefastenings on the raceway leading to the driving mechanism. A

The hopper or receptacle M is shown as provided with a sprocket-wheel10, which is embraced bya' flexible connection, shown as asprocket-chain 11, surrounding a sprocketwheel 12, loose on the outerend of a short shaft or arbor 13, upon which said wheel 12 is retainedby a suitable nut 14. Fast on this shaft 13, 'immediately behind theWheel 12, is a pawl-carrier 15, to which is pivoted thepawl 16,maintained by a spring 17 in normal engagement with a series ofratchetteeth 13, upon or secured to the rear side of thesprocket-wheel12, oscillation of the shaft 13 and its pawl-carrier 15causing the pawl 16 to impartaV step-by-step rotation to theratchet-Wheel-lS, its sprocket-wheel 12, and

through the chain 11 a corresponding step-bystep rotation to thesprocket-wheel 10 and delivery-controlling means M.

The shaft 13 referred to is provided at its end opposite thepawl-carrier 15 (see Fig. 3)

with a laterally-extended arm 19, acted upon by a spring 20, whichmaintains the said arm normally pressed against the depending freey IOO\ ble jar or eect upon the actuator.

forces the latter gradually back or to the right, Fig. 3, it in turnacting upon the arm 19 on the shaft 13 to rotate said shaft and actuatethe ratchet-wheel 18 and parts controlled thereby, as described` Asuitable detent 30 acts to prevent retrograde movement of theratchet-wheel 18.

It will readily be seen that however sharp or violent the downward ordriving movement of the driver actuator or carrier d2 the movement ofthe feed-lever 2l as it is forced to one side is always gradual, andsaid lever is consequently relieved of most if not all of any shock orimpact received by the actuator, and therefore the feeding movement ofthe parts described is also relieved of any impact or blow. In this waythe feeding devices actuate more easily and with less violence thanheretofore. Further than this the feeding movement by the partsdescribed is so gradual, however sharp be the movement of the actuator,that the parts are set in motion and perform their work with nopercepti- In other words, the operator in deliveringr the blow upon theactuator feels no jar of the feeding devices as the latter operate infeeding the fastenings. To make this clearer, it may be further statedthat in devices of this class as heretofore constructed the feedingdevices have been actuated at or about the time of the greatestresistance to the movement of the actuator by the driving of the tack,and to such resistance there is added the further resistance of thefeeding devices performing their work, which always gives to theactuator an uneven movement distinctly and injuriously felt by the handof the operator. In my improved device, however, it will be lnoticedthat the feeding movement commences immediately on the descent of theactuator, and the movement of such feeding devices from that time untilcompleted is so gradual that their action is not perceptibly felt by theoperator.

I-Ieretofore in devices of this character it has been common totransform the reciprocating movement of the actuator into rotarymovement of the feeding devices through the intervention of levers,usually of considerable length, and by reason of their length havingconsiderable movement at their free ends, thus necessitating more orless lost motion between the ends of the levers and the parts actuatedthereby to insure certainty of operation without too nice adjustment.This lost motion or looseness causes impacts which are distinctly feltby the operator. In this invention, however, it will be noticed that thereciprocating movement of the actuator is transformed into rotarymovement at a point close to the said actuator on the casing A, and aslight reciprocatory movement-as, for instance, that of the feed-lever2l-is therefore suiiicient to provide the necessary rotary movement-as,for example, of the sprocketwheel 12-thereby reducing the amount of lostmotion and correspondingly eliminating the contacts or shocks whichwould result from the use of parts of greater length and having greatermovements with more lost motion. All these features combined give to thedevice herein described as embodying my invention a smoothnessand anease of operation heretofore quite unknown in apparatus of thischaracter.

By the use of a flexible connection, as the sprocket-chain I1, fortransmitting the motion from the feedactuating device to the actualfeed-controlling part, as the part M, a certain vflexibility is hadwhich prevents injury should the apparatus meet with accident, as bydropping upon the floor or otherwise, whereas con necting-levers asheretofore used would very generally be bent, broken, or thrown out ofadjustment by a blow that would in no wise injure my present device. Theuse of the eXible connection also of course renders the device somewhatlighter and greatly simplifies the mechanism, making it cheaper andeasier to clean.

In order to maintain the fiexible connection under proper tension at alltimes, I have herein provided a wheel 25, mounted upon the free end ofan arm 26, fulcrumed at 27 on the head of the machine and held. inadjusted position by a set-screw 2S, passed through a slot 29 in the armreferred to and screwed into the said head.

My invention of course is not restricted to the embodiment herein shown,for the same may be varied without departing from the spirit and scopeof the invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

IOO

l.` In a hand nailing apparatus, the combination with a driver and adriver-actuator, of means for controlling the supply of nails to saiddriver, and an endless flexible connection traveling always in onedirection interposed between. the said driveractuator andnail-controlling means, and through which the latter is actuated by theformer.

2. VIn a hand nailing apparatus, the combination with a driver and areciprocating actuator therefor, of a loose nail-holding receptacle,means controlling the supply of nails therefrom to said driver, and aexible connection traveling always in one direction interposed betweenthe said driver-actuator and nail-controlling means, and through whichthe latter is actuated by the former.

3. In a hand nailing apparatus, a reciprocating driver and itsactuator,rotary means located at one side of said driver and more or less removedtherefrom, to control the supply of nails to said driver, and means toconduct the nails from said rotary nail-controlling means to saiddriver, combined with means closely adjacent the said driver and itsactuator for transforming the reciprocating movement of the latter intoa rotary motion, and connections between such means and said IICnail-controlling means for operating the latter by or from the former,said connections being independent of said controlling means,

substantially as described.

4. In a hand nailing apparatus, a case containing a reciprocatingdriver, a driver-actuator, a rotary nail-controlling part carried bysaid case, and means to conduct the nails` from said nail-controllingpart to said driver, combined with means for obtaining a rotary movementby and from the reciprocating movement of said driver or its actuator,and a iiexible connection joining such ymeans with and to rotate saidnail-controlling part, said flexible oonnectioribeing independent ofsaid nail-conducting means, substantially as described.

5. In a hand nailing apparatus, a case, a reciprocating driver, itsactuator, a rotary feed-controlling part, means to conduct nailstherefrom to said driver, and means independent of said nail-conductingmeans and actuated by said driver and in'cludinga flexible-connection,for transforming a step-by- .step rota-ry movement always in one direc-`tion to said feed-controlling part from said driver or its actuator,substantially as .described. I i' 6. In a hand nailingk apparatus, acase, a reciprocating driver, and its actuator, a wheel journaled onsaid case, and devices moved by said actuator to impart a step-by-steprotation'to said Wheeha rotary nail-receiving hopper also-mounted onsaidcase, and an endless connection joining the same with and to berotated by said wheel, substantially as described. v

7. In a hand nailing apparatus, a case, a reciprocating driver, and itsactuator,a Wheel, and devices to impart a step-by-step movement theretofromsaid actuator,a rotary feedcontrolling hopper, and a flexibleconnection j positivelyrotating the same from the said wheel,substantially as described.'

8. In a hand nailing apparatus, a case, a`

' nection, Y whereby hand-operated reciproca--y tion'of the said drivertransmits therefrom through the said iiexible connection a rotarymovementto the said nail-controlling part.

l0. In a hand nailing apparatus, the combination with a suitable case,anda hand-operated l'driver arranged therein, of a loose nailholdingreceptacle, a raceway to conduct the loose nails therefrom to drivingposition'adjacent the said driver, a rotar)T feed-controlling partgoverning the flow ofthe loose nails to said raceway, and an endlessflexible connection interposed between said driver and said rotarynail-controlling part for operating the'latter lbyhand-operated movementof the former. l A v In testimony .whereof I havesigned my name to thisspecification in the-presence of two subscribing Witnesses.

MATTHIAS BROCK.

Witnesses: v

FREDERICK L. EMERY, LAURAVT. MANrX.

